99 Speedster SK
- Thread starter slipnot
- Start date
- Status
Discontinued Part from SeaDoo and Dealer says "good luck"
JeremyD615
Well-Known Member
If the pump is not the same as racerxxx’s, my next call would be to Westside Powersports to see if they’ve got a good used one... They’re more likely than anyone to have one on the shelf...
JeremyD615
Well-Known Member
I’d agree 100%. I just don’t know what other options are out there without reengineering the fuel system. Hopefully there’s a solution out there that doesn’t involve trying to make an aftermarket pump and regulator setup work...
mk-bn38/44 spr
That's the rebuild kit part number. Do not use the springs, use your old ones. You also need new needle and seats with a viton tip. I think you need 1.2 for the 720's. Make sure you get genuine mikuni kits. Do not use aftermarket kits or needles and seats.
If you're careful, you can disconnect the throttle linkage and probably not have to adjust your idle. There are 2 screws that hold it onto the MAG (front) carb. Remove those and carefully remove the cables. Yes, it's tough but it's less set up on the back side of the project. Hopefully the mounting screws come out easily, if not it's gonna suck.
I remove the engine cover to work on it. Then you can kinda lay on the swim deck. Open the engine cover, wedge a towel in the gap under the cover, I think yours has a grab handle? If so slide the towel to the center, make sure it's tight, it will give you support. Then, locate the hinges. Some guys say they remove the pins from the hinge, mine are not removable. Take a pencil, trace around the hinge on the boat side. Remove the outer 2 screws on both hinges, use plenty of WD-40 while removing the screws, you can't use to much, you don't want to break one. Then on the lift struts there is a clip at the end, it's what holds the end from popping of the ball stud. Take a little screw driver and pop that clip out a little bit, not all the way off. With a helper holding that side, repeat the process, then finally remove the last 2 screws in the hinges. Then remove the engine cover. I'ma bigger guy, I can do this solo, non sk boat, I think your cover might be different?. This is the only way to do this job on my opinion. I refuse to hang upside down.
That's the rebuild kit part number. Do not use the springs, use your old ones. You also need new needle and seats with a viton tip. I think you need 1.2 for the 720's. Make sure you get genuine mikuni kits. Do not use aftermarket kits or needles and seats.
If you're careful, you can disconnect the throttle linkage and probably not have to adjust your idle. There are 2 screws that hold it onto the MAG (front) carb. Remove those and carefully remove the cables. Yes, it's tough but it's less set up on the back side of the project. Hopefully the mounting screws come out easily, if not it's gonna suck.
I remove the engine cover to work on it. Then you can kinda lay on the swim deck. Open the engine cover, wedge a towel in the gap under the cover, I think yours has a grab handle? If so slide the towel to the center, make sure it's tight, it will give you support. Then, locate the hinges. Some guys say they remove the pins from the hinge, mine are not removable. Take a pencil, trace around the hinge on the boat side. Remove the outer 2 screws on both hinges, use plenty of WD-40 while removing the screws, you can't use to much, you don't want to break one. Then on the lift struts there is a clip at the end, it's what holds the end from popping of the ball stud. Take a little screw driver and pop that clip out a little bit, not all the way off. With a helper holding that side, repeat the process, then finally remove the last 2 screws in the hinges. Then remove the engine cover. I'ma bigger guy, I can do this solo, non sk boat, I think your cover might be different?. This is the only way to do this job on my opinion. I refuse to hang upside down.
Are the needle points seperate?
I can't thank you enough for your help. I have three days before the grand kids show up so I an trying to stack the deck in my favor. If I might need it I want to order it tonight if possible. Does Mikuni supply the needles and seats?
Manual says 1.5....
JeremyD615
Well-Known Member
I’m seeing 1.5 needles and seats for that model as well...
toolmaker1045
Member
Dont waste time I had same problems was told rebuild carbs replace spark plugs replace fuel filter ! Finallt replace fuel PUMP and it ran like a RAPED APE!!!!!!!!!!!!!!!!!! Replace the fuel PUMP!!!!
Okay have the carb put back together and install. I started to take it out on the lake and try and start it. Two things happened, one my boat sucked up a bunch of weeds (man overboard to fix that) 2nd is that the engine with the rebuilt carb woudn't fire. I don't know how long it takes to get fuel "going again but I tried for about 5 minutes with the other engine running. I was going back in (didn't want to wear out the starter) and I couldn't get the shifter out of forward to neutral!!! So I can move the shifter slightly if I put the throttles all the way back to idle it moves out of forward a little. I can't get it to move to neutral anymore. Ideas?
- Status
